Keb,
I agree with James... It might take a little "engineering" of the ram rod pipe, but ideally, there shouldn't be a bulge on the underside. Having said that, what Rich said is very true, American arms were all over the place. There were no "specs" as we know them today. Congress instructed the various manufactories and Committee's of Safety to make American muskets "in the image of the British muskets", or words to that effect. Looking good!
Ed